I takes the body at least 3 days before the body goes inot Ketosis and which point any "real" hunger should subside and being that you are still at the very begining I would would advice you to just bite the bullet and use you brain andf will power to hang tough and wait it out. Some folks will do a tbsp on blackstrap molasses to help with hunger. .
I don't know as I had trouble remembering to drink 6 lemonades a day and often only managed to drink 5. I rarely felt hungry during the 31 days I fasted and if I did it was because I delayed a lemonade too long. Drinking the quart of warm salt water in the morning kept me from starting on the lemonades until late morning as they did not mix well for me. Wow, I just do not know why you are so hungry unless the problem is drinking so many makes your body process the lemonades as food and therefore perhaps preventing going into ketosis. It may just not be a good time for you to do the Master Cleanse. How long did you do this?